If your destination is east of Village Center Drive (shown in blue), use Yorba Linda Boulevard/Weir Canyon Road from the Riverside Freeway to get to and from your destination. If your destination is west of Village Center, use Imperial Highway to the greatest extent possible to get to and from your destination.
Mouth ulcers are caused by many disorders. These include: 1  Canker sores. 2  Gingivostomatitis. 3  Herpes simplex (fever blister). 4  Leukoplakia. 5  Oral cancer. 6  Oral lichen planus.
Causes of mouth ulcers. In most cases, mouth ulcers are not caused by an infection. This means they cannot be passed from person to person. For example, in most cases it is not possible to get a mouth ulcer from kissing someone who has a mouth ulcer, or by sharing drinking glasses or cutlery with them.